Catalytic or contact agent.



BY MESNE ASSIGNMENTS, T0 GEN i'l OF NEW YORK, N. Y, A CORPORATION OF N EW YORK.

1 rr. cotoaun, a L CHEMICAL conrnm,

oarnnrrro 0a oon'rnor aannr.

Specification of Letters Patent.

1V0 Drawing. Original application filed June 23,1913, Serial No. 775,363; Divided and this application To all whom it may concern:

Be it known that we, HERMANN VON KIELER and ANTON WEINDEL, doctors of philosophy, chemists, citizens of the German Empire, residing at Leverkusen, near Cologne-on-the- Rhine, Germany, have invented new and useful Improvements in a Catalytic or Con tact Agent, of which the following is a specificatio'n.

This invention relates to a new catalytic.

' or contact agent; and it comprises anew 1,102,670, dated July 7, 1914, in which We I .for contact use in the S catalytic agent containing silver and vanadium in the form of a silver-vanadium compound, and more particularlyin the form of silver vanadate. J- It also comprises such 'a catalytic distributed upon a suitable carrying base and more specificallyitcomprises as such a catalytlc or contact substance silver meta-vanadate precipitated upon asbestos or. other suitable base; and it further comprisescertain novel features of the contact material; all as more full hereinafter set forth andas claimed.

'1 isapplication is a division of our pipplicatio'n which has become Patent describe and claim processes carried out with these specific catalytic agents.

silver and vanadium, such as silver vanadate, form valuable catalytic or contact substances rocesses, and particularly for We have discovered, that compounds of lete oxidation of the SO, beinf obtainable y the use of such catalytics. n using the catalytic it may be conveniently distributed upon a suitable base such as asbestos. Various means of accomplishing this distribution may be employed. For example the contact.

. support such as asbestos may be impregnated with a solution of a suitable vanadium oompound such as ammonium meta-vanadate treated and and the asbestos after being thus impregnated may then be treated with a. solution of silver nitrate or other soluble silver salt to precipitate the silver vanadium compound, such as silver meta-vanadate.

'l e amount, of the compound which is a contact process, almost comfiled January 16, 1914. Serial-No. 812,440.

used can be-variedand alsothe relative amount of the compound precipitated or otherwise distributed upon. the asbestos or other base. In the conversion of a mixture .of sulfur dioxid and oxygen into sulfur trioxid by the contact process, using silver vanadate as a catalytic, an amount of this compoundequal to about 20 per cent. of the amount of the asbestos support gives good results. I We claim a 4 1. A new catalytic agent comprising a silver-vanadium compound distributed upon a suitable carrying base.

A .new catalytic agent comprising a silver-vanadium compound distributed upon asbestos.

3. A new catalytic agent comprising a sllver-vanadium compound in the form of silver vanadate distributed upon a suitable carrying .base.

4. A new catalytic agent comprising a s lver-vanadium compound in the form of 'sllver vanadate distributed upon asbestos.

:5. A new catalytic'agent comprising a silver-vanadium compound in the form of silver meta-vanadate distributed upon a suitable carrying base.

6. A new catalytic agent comprising a silver-vanadium compound in the form of silver 'meta-vanadate distributed upon asbesto's. 4

7. A new catalytic agent comprising a carrying base impregnated with a silver- I\oranadium compound precipitated upon said ase. a

8. A new catalytic agent comprising asbestos 'im regnated with a silver-vanadium "compoun precipitated upon said asbestos.

In'testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

HERMANN m KELER. ANTON wnmnnn. I

Witnesses: Hans BRUCKNER, CHRISTIAN Hansen. 

